Skip to content
OpenAdvisories
Medium · 6.5 CVE-2026-104969 EUVD-2026-92491

Plane: Cross-Tenant Cycle Issue Hijack via IDOR

Published Oct 5, 2026 · Updated Oct 5, 2026 · Assigned by GitHub_M

Description

Plane is an open-source project management tool. Prior to 1.4.0, the cycle-issues endpoint accepts issue UUIDs in the request body without validating that they belong to the caller's workspace. An authenticated user can add issues from any workspace to a cycle they control. If a victim issue is already assigned to a cycle, the operation removes it from the victim's cycle, causing a destructive cross-tenant write. This issue is fixed in 1.4.0.

Affected products

VendorProductAffectedFixed
makeplane plane < 1.4.0 —

References